TCPOLEN_SIGNATURE
if (optlen != TCPOLEN_SIGNATURE)
int siglen = TCPOLEN_SIGNATURE - 2;
if (TCP_MAXOLEN - optlen < TCPOLEN_SIGNATURE) {
optlen += TCPOLEN_SIGNATURE;
*optp++ = TCPOLEN_SIGNATURE;
PADTCPOLEN(TCPOLEN_SIGNATURE) : 0) +
optlen += PADTCPOLEN(TCPOLEN_SIGNATURE);
optlen += PADTCPOLEN(TCPOLEN_SIGNATURE);
optlen += PADTCPOLEN(TCPOLEN_SIGNATURE);
optlen += PADTCPOLEN(TCPOLEN_SIGNATURE);